Method
Slice the ripe bananas into 8-10mm slices and place in a freezer-proof
sealable tub and freeze for at least 4hrs preferable for 24 hours.

Remove from the freezer, using a hand blender, pulse the mixture to
break up the ice crystals until the lumps turn to a smooth constituency,
add the vanilla essence, add sweetener as required, depending on how
ripe the bananas are. Add a small amount of milk to help it turn into a
smooth mix. Return to the freezer for 1hour, repeat the above action
until the mix has frozen and looks & feels like ice cream.
Mine was removed and mixed at least 4 times. But I couldn’t wait and this picture was taken after 3 mixes!

Add any fruit for flavouring or add option packet of Belgium chocolate.